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x:18=0.51.8:x=13x:20=4:5x8=3716x+23x=14134x−20=2934x÷25=544x+5x=811x+23x=10934x+20=50
题目详情
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▼优质解答
答案和解析
x:18=0.5,x=0.5×18,x=9; 1.8:x=13 x=1.8÷13,x=5.4; x:20=4:5 5x=20×45x÷5=80÷5x=16; x8=377x=3×8,7x÷7=24÷7, x=247 16x+23x=14 (16+23)x=1456x÷56=14÷56 ...
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